Rotary oil burner



Ngv, 22', 1932.

M. PQWERS ROTARY OIL BURNER Filed July 24, 1929 2 sheets-sheet' 1 Q... Q Q S inv'.

Patented Nov. 22, 1932 UNITED STATES Amn:mi omen HILTON A. POWERS, 0F DETROIT, MICHIGAN, ASSIGNOR TO TH'E TIMKEN SILENT AUTOMATIC COMPANY, OF DETROIT, MICHIGAN, A CORPORATION 'OF MICHIGAN' ROTARY oIL BURNER Application filed J'uly 24,

This invention relates to rotary oil burners and has for its principal objects a simple and compact construction in which the fuel is evenly distributed around the firing Zone of the combustion chamber and the proper 'amount of air for combustion is supplied to thefuel in the region of said firing zone.

Another object is to prevent atomizing of the l fuel. in the distributor head. Another object is an improved 'shutter construction for regulating the air How. Other objects are fewness of parts, economy of design and reduced noise of operation. The invention consists in the rotary oil burner and in .the parts and,` ycombinations and arrangement'of parts hereinafter described and claimed.

In the accompanymg drawlngs, which v form part of this specification andv wherein like symbols occur,

Fig./ 1 is fa vertical .longitudinal section refer to like parts Wherever they `through arotary oil burner embodying my -I'therefrom that are provided with vertical openings adapted to slidably engage tubular sup orting legs 3. The leg engaging brackets 2 o the supporting frame are provided vwith set screws 4, whereby. the frame may be clamped to the supporting lees 3 in any desired position of its vertical sliding movement' thereon. The tubular legs 3 are interiorlyV threaded to receive the threaded shank pormembers 6 are provided with transverse openmgs Sadapted to receive a pin wrench, where# tion 5 of foot members 6 that 4are provided with rubber cushioning blocks 7. The foot by the foot members may be rotated relative 1 to the supporting legs to secure a fine vertical adjustment Vof the supporting frame independent of the coarser adjustment afforded 192B. Serial No. 380,527.

by the Sliding Connection between said legsv and said frame.

The main body portion 1 of the supporting frame A is provided with two diametrically' vopposed upstanding brackets 9 having horizontal top flanges 10 upon which is bolted the outstanding base flange 11 of a hearth ring 12. Arms 13 extend radiallybeyond the hearth'ring 12 to the furnace wall with their mner ends resting on the top of the 4base flange 11 of said ring and terminating inv downwardly offset portions 14`that extend.

through vertical openings or recesses 12a in said base fiange and bearLagainst the underside thereof, thereby anchoring the inner ends of said arms to said hearth ring. Supported on the radially extending arms 13 of the supportingframe A is a sheet metal plate 16 upon which is built a hearth 17 of refractory material, which forms the floor ofthe combustion chamber of the furnace and has. la suitable flame retaining ring 17aat 'thev outer periphery thereof.

Mounted in the supportin frame A conv 4- centric .with 'the -ringlike ody portion `1 thereoflis an electric motor B comprising-a casing 18 having oppositely disposedoutstanding arms 19 provided with vertically elongated slots 2O adapted to receive cap screws 21 that are threaded into horizontal holes provided therefor in diametrically opposed vertical anges or lugs 22 onthe inner side of said body portion of said supporting v frame. The 'motor B may be adjusted vertically relative to its 4 supporting frame A as far as the elongated slots 20 will permit by means of ad'usting screws 23 that are l vertical :holes providedl therefor in horizontal lugs 24 formed intethreaded throng gral with said frame beneath the motor supporting Hanges 22 thereof and abut at their flanges. Lock nuts 25 are provi ed for securing the motor adjusting screws 23 in the desired adjusted position.

The lower end of the armature shaft 29 of the motor .B is journaled in a bearing 30 provided therefor ina -lubricant chamber 31 formed in the lower end of the motor casing 18.` The armature shaft is supported at its -upper ends against the lower ed es of said l end of the motor casing v18, which bearing is.

lower end on a ball thrust bearing 32 seated inthe lower end of the lubricant chamber 31. A pipe 33 is threaded int-o the chamber 31 for supp ying lubricant thereto. The upper end of the armature shaft 29 is supported in a bearing 34 provided therefor in the upper I supplied with lubricant from a chamber 35 located therebelow by means of an oil wick 36. A pipe 37 is threaded into the chamber 35 for supplying lubricant thereto ounted on and rigidly secured to the upper end of the motor casing 18 -is an oil cup C having a hub 39`through which the armature shaft 29 extendsv and a comparatively shallow annular recess 40 in' its bot/tom ada ted to be supplied With-oil through an oil eed pipe 41 threaded into said cup. The

i `ilow ofthe 011 to the annular recess A40 in nularl spaced picker blades or tabs 43 thatl to or slightly below the'.

the oil-cup C and head D is thrown radially outward therefrom inner surface thereof, causes the bottom of. the oil cup C may be regulated by any suitable means (not shown). The

armature shaft 29 extends upwardly above the oil cup-C and has the hub-of a distributer head D rigidly secured thereto for rotation..

therewith. The distributer head is made 1n the form of a hollow cone disposed with its' small end down and extending into the oil cupy C.. The small lower end of the hollow cone-shaped distributer head has an annular late 42 screwed thereto, which is provided at its inner periphery with a series of an# exten -`downwardl level of the oil in t 1e annular recess 40 in the bottom yof 'the oil cup C. The blades 43 rotate with the hollow 'distri-buter head D landare shaped and arranged to lift `or pick up the'oil Afrom the annular oil recess 40 in to the firing ring 17 a of the'heart-h 17 through a series of circumferentially spaced radially disposed -flinger tubes 44 that extend upwardly and outwardly from the upper' edge of said head and terl'ninate at their upper ends in horizontally disposed portions located I i v at about the level of the firing ring 17 a. The

oil that is discharged from the fllnger tubes is not. finely atomized but leaves the tip of l said tubes in the form of a thinv sheet and is evenly distributed around'the firing. ring 17 a of the hearth in the form of fine drops.`

Air for combustion is supplied to the oil deposited on the'. firing ring 17 a of the deposit it upon the lower shutter construction is open intake to the fan at all times thus greathearth by a fanE mounted on theu of the hub of the distributer head Said fan comprises a dished 4circular plate 45 that is perforated at its center to receive Ithe armature shaft, and is clamped to. the upper end of the hub of the distributer head by meansof a nut 46 threaded on the upper end of said shaft. The plate 45 of the fan is provided with a series'of openings through which the iinger tubes 44 extend. The top plat-e 45 of the fan is provided at -itsperiphery with a depending flange 47 having outstanding blades 48 struck from openings therein. It is.

noted that the fan blades 48 are located below the tips of the dinger tubes 44, whereby air per end i flows from said fanv below the level of said" tips and does not mix to an 'appreciable ex` tentwith the oil articles until it reaches the region of the ring ring of the hearth. Wit-h this arrangement, oil is vdistributed around the periphery of the hearth without being atomized, with the result thatits inflammability the flame to The amount of air delivered'by the fan yE is regulated by means of a shutter F comprisl i ing a cylindrical tube 49, whose lower end ring 12 and whose upper end `fits depending peripheral flange 47 Aof said fan. The air shutter F is secured to the upstandis reduced and the tendency for flash vback towards the burner 'is eliminated.

has a slidable and rotatableiit inthe -upstanding annular ilange of the metal` hearth within the ing annular flange ofthe hearth ring12l by means of threaded studs 50 that extend through a series of elongated slots 51 in the cylindrical tube 49 of said shutter and are threaded into said nupstanding flange.` slots 51 are disposed atan oblique angleto the axes of the shutter, whereby rotation of the shutter causes it to move vertically across the openings in the peripheral flange of the thus regulate the flow of air from fan and the fan. An operating'handle 52 projects radially outward justed. An important that it allows a full ly increasing the maximum capacity of the fan over but with the 'conventional air intake having from the lower end of the` ,shutter whereby it may be conveniently adadvantage of this The' that of other fans ofthe same size overlapping shutter surfaces. In fact, the

air. intake area is more than 200%v of the maximum with the conventional design.

Another advantage lies in the fact that the air is evenly distributed; from the periphery of the fan. shutter collar protects the inside burner parts against radiant: heat from the combustion chamber and it allowsl adjustment of the fanv verticallyin the irebox without chance for air leakage between fan and hearth ring.

The hereinbefore described oil burneris slmple and compact in construction and com-V Another ,advantage is that the f paratively inexpensive to manufacture, the

air shutter, fan, and distributer head may be removed and the legs raised, thus reducing foot portions of the le The oil and air leave the burner at di erentl elevations and do not mix to an appreciable extent until they reach the region of the firing ring at the periphery of the hearth, therebyv overcoming the tendency forthe flame toiflash back towards the burner. The shutter may beY adjusted to any desired position to regulate the flow of air without decreasing the width of the. fan openings, thereby-securing an even discharge of the air around the periphery of thefan in all positions of adjustment of the damper; and the construction of distributer head secures an even distribution and steady iow of oil to the flinger tubes` Without breaking up or atomizing the oil.

Obviously, the hereinbefore described oil burner admits of considerable modification without departing from the invention, and I do not wish to be limited-to the struction shown and described.

What I claim is:

1. vA rotary oil burner comprising a supporting member, an electric motor thereon, anv armature shaft for said motor, a cu mounted on said motor a'nd having a .hu

portion sleeved on the armature shaft there'.-

of, means for feeding liquid fuel to said cup,

- and a distributer head fixed to said shaft with its lower end disposed in said cup, said distributer head having. an inverted coneshape chamber therein communicating at its bottom with the interior of said cup,- said distributer head chamber being provided at its upper end with a series of circumferentiallg spaced discharge o nings, and means on t e lower end of said 'stributer head adapted to pick up the fuel in said cup and deposit it on the conical surface head chamber.

2. A rotary oil burner comprising a supporting member, an electric motor thereon, an armature shaft for said motor, a cup mounted on said motor and having a hub portion sleevedon the armature shaft thereof, means for feeding liquid fuel to said cup, and a hollowv inverted cone-shaped distributer head fixed to said armature shaft with its' lower end disposed'in said cup, Said distributer head being provided at its upper end precise conof said distributerl 'adapted to pick upl the -fuel in said cup and deposit it on the conicalinner surface of said gal distributer head rotatable with said shaft, l

Vflinger tubes projecting outwardly from said distributer head, means for supplying liquid fuel to said head, a fan rotatable with said shaft and surrounding said distributer head below the discharge ends of said llinger tubes, and an axially adjustable tubular shutter interposed between said distributer head and said fan.l

4. Al rotary oil burner comprising a supporting member, an electric motor thereon, a

vertical-armature shaft for said motor, a centrifugal fuel distributing head'rotatable with said 'armature shaft, a fan rotatable with said armature shaft and provided with a depending peripheraliange having a series of openings, and an axially adjustable cylindrical tube disposed concentric to said peripheral flange with one end inside thereof.

porting member, a hearth ring mounted on said support, an electric motor mounted on said support concentric with said ring, an

armature shaft for "said motor, -a fuel disv tributing headfixed to said armature shaft,

and a fan rotatable with said distributer head, said fan being provided with a depending peripheral flange havin aseries of openings, `a cylindrical tube disposed in said hearth ring :with its upper end fitting Within the peripheral flange of said fan, said tube being provided with a series ofv elongated slots, and pins projecting from the inner face of said ring into said slots, said slots extending at an voblique angle to the axis of said tube, whereby said tubewhen rotated onitsv `axis `Will.be shifted axially relative to the peripheral flange o f said fan.

6. A rotary oil burner comprising a supporting member yan electric motor thereon,

an armature sha t for said motor, a fixed cup concentric with said armature shaft, means for feeding liquid fuel to said cup, anda centrifugal distributer head rotatable with said armature shaft and operating to pickup the fuel in said cup and project it radially outward, said head having an inverted .coneshaped recess therein opening into said cup' and a series of blades at the lower edge of said recess yoperating to pick up the oil in said cup and,

deposit it on the walls of said 7. A rotar oil vburner-'comprising asupvporting mem er, a rotary shaft, a cu mounted on said supporting member and ving a 5. A rotary oil burner comprising a Suphub portion sleeved on the rotary shaft, means for feeding liquid fuel to said cup, and' a dstributer head xed to said shaft with its lower` end ,disposed in said cup, said distributer head having an inverted cone-shape chamber therein communicating at its bottorn with the interior of said cup, said distributer head chamber being provided at its upper end with a series of circumferentially spaced discharge openings, and vmeans on the lower end of said distributerhead adapted to `pick up the fuel in said cup and deposit it on the conical surface of said distributer head chamber.

Signed at Detroit, Michigan, this 19 day of July, 1929.

MILTON A. POWERS.

Gl i 

